The new iPhone 15 has more detailed battery information in the Battery section of the Settings app. One of the new features is the ability to limit the maximum battery charge to 80% of the total capacity to ensure a longer overall lifespan.
In fact, multiple charges to more than 80% and discharges below 20%, as well as heat, cause the battery to deteriorate more quickly.
Where to set priorities?
Still, we all want the battery to last as long as possible before replacing it or buying a new device. For this purpose, it is best to only charge the battery to 80%.
If you're happy with the daily battery life at 80% charge, then that's not a problem. Limit charging to this level in the Settings app on your iPhone 15.
For example, your schedule – at the office – allows you to easily charge your device, so you opt for the 80% setting.
Conversely, if your use requires a full charge to avoid having to plug in your favorite phone in the middle of the day, you have no choice but to do so, since it is more inconvenient if you run out of electrons than if you run out of battery discharges a little more slowly.
Be careful of extreme heat
For the latter, it is ideal to leave the default settings at 100% to use the full capacity of your battery for the day.
Aside from normal consumption, extreme temperatures and time spent in a high or low state of charge cause the most damage to lithium-ion batteries. We therefore avoid charging in an overheated car in the sun,
AFP
It depends on the type of charger. Fast chargers tend to heat up batteries, releasing up to 80% of energy and then slowing down for the remaining 20%.
If you're charging overnight while you sleep, a simple, regular 5V slow charger will do the trick.
Optimized loading
If you take a look under Settings > Battery > Battery Level, you'll find the Optimized Charging option, which learns your charging habits and keeps the battery at 80% overnight, ready for use just before you need it. to charge to 100%. This reduces the time the battery remains in a high state of charge.
In conclusion, it is always good to take a look at the power-intensive features and applications. Screen brightness, sleep time, location services and many others – it's up to you to adjust the appropriate settings according to your needs.
The optimized charging function under iOS 17.2.1 Apple